Re: [Xen-devel] xen/x86: unable to build with gcc5

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2015-03-13 at 13:25 +0000, Jan Beulich wrote:
> >>> On 13.03.15 at 13:00, <ian.campbell@xxxxxxxxxx> wrote:
> > Error: size of boot.o:.text is 0x026c
> > /build/gcc5/xen.git/xen/Rules.mk:180: recipe for target 'boot.init.o' failed
> > 
> > $ objdump -t ./xen/arch/x86/efi/boot.o | grep -P '[^t]\.text[^\.]'
> > 0000000000000000 l    d  .text      0000000000000000 .text
> > 0000000000000000 l     F .text      00000000000000e9 pre_parse.constprop.9
> > 00000000000000f0 l     F .text      0000000000000123 get_value.constprop.10
> > 0000000000000220 l     F .text      000000000000004c 
> > set_color.part.4.constprop.11
> > 
> > pre_parse, get_value and set_color are all annotated with __init, but I
> > guess this is something else. Any idea what to do? Possibly a gcc bug?
> > 
> > Building with -k -s I also see:
> > 
> > Error: size of unxz.o:.text is 0x06b
> > ->
> > 0000000000000000 l    d  .text      0000000000000000 .text
> > 0000000000000000 l     F .text      000000000000006b dec_vli.isra.1
> > 
> > Error: size of dmi_scan.o:.text is 0x018f
> > ->
> >  grep -P '[^t]\.text\b'
> > 0000000000000000 l    d  .text      0000000000000000 .text
> > 0000000000000000 l     F .text      000000000000018f 
> > _dmi_iterate.constprop.6
> 
> The same with these other two cases too - they're properly
> annotated. I.e. the compiler forgets to propagate the section
> attribute when generating variants of the functions (e.g. after
> having detected that it always gets called with some argument
> set to some specific value). Do you want to report this as a bug
> (assuming there isn't one already; I for one can't find any) from
> the Debian side, or should I open one?

I'll bounce the Debian Xen bug back to the Debian gcc package with your
comments and I suppose the maintainer will then take it upstream.

Ian.



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